こんにちは I searched about the meaning of "たものですか" and I found out it means " used to " but in my example "used to " is not logic
here's my example (snippet from a conversation in a book)
A:この絵はすごいですね.いつごろかかれたものですか
Ｂ：ええっと.14せいきにかかれたそうです.
here in A's sentence " when it's used to be drawn " is not logic for me ! can any one help me translate the sentence of A and tell me the meaning of ""たものですか" here what ?
いつごろ かかれた もの ですか
When was it drawn?
The sentence could probably be interpreted more awkwardly as
What period of time is this drawn thing [the drawing/painting]?
which might explain how you get the above translation.
もの refers to "thing", so
いつごろ の もの ですか
When was this?
could be interpreted more literally as
This thing is of what time?
which because your questions are around some work of art (painting, statue):
What time period did this work originate from?
